Safety razor



Feb. 7, 1928. v 1,658,435

- H. J. GAISMAN SAFETY RAZOR FiledOct. 6. 1923 2 Sheets-Sheet 2 IN VEN TOR vfAT roRNEy Patented Feb. 7, 1928.

PATENT OFFICE.

' was: :r. enamels, or new you n. Y.

more.

REISSUED Application filed October 6, 19 23. aerial 10.366909.

My inventionhas particular reference to the class of safety razors in which a blade is clam d between a guard and a backing to retain the cutting edge .or edges of the blade in shaving relation to the guard teeth. Heretofore, so far as I am aware, in the class of razors above referred to the backing was provided with cylindrical pins spaced apart to enter corresponding holes in the blade and in the guard plate or memher, and a handle attached to said backing clamped the blade between the guard plate or member and the backing. The holes in the blades for said pins have been considerably larger than the pins, providing ready assembling of the parts whereby the blade has been somewhat loose on the pins, hence the blade has been permitted freedom upon the guard in adjusting the parts.

9 An object of my invention is to provide new and improved means between the pins of the backing and theopenings or holes 'in the blade in such a manner that the pins will cooperate with the blade to resist relative movement of the blade with .respect to the guard so that the blade will be properly positioned respecting the guard at all times when the parts are clamped together.

A further feature of my invention is that by reason of the arrangement of the holes or openings in the blade, strain through the center of the blade is'relieved when the blade is being clamped between the guard member and the backing member to reduce danger of the blade cracking or splitting in a lengthwise direction while being bent or undertension.

Myinyention also comprlses novel details of improvement that will be more full hereinafter set forth and then pointed out in the claims.

Reference is to be had to the accompanyin drawings forming a part hereof, wherein Fig. 1 is a sectional view illustrating the parts of my improvedrazor assembled;

' Fig. 2 is a detail plan viewof the guard member;

Fig. 3 is a section on-line 3, 3, of Fi 2; 'Fi 4: is an inverted plan view of the '0 backing;

Fig. 5 is a detail of the blade; Fig. 6 is a sectional view illustrating a modified form of'the razor assembled;

Fig. 7 is a top View of the guard member of Fig. 6; 5 5

Fig. 8 is an underside view of the backing member of Fig.6;

Fig. 9 is a plan View of the blade of Fig. 6'. Similar numerals of reference indicate corresponding partsin the several views.

The numeral 1 indicates a guard member provided with suitable guard teeth 1 at its opposite edges and having holes 2 to receive projections or pins 3 extending from backing member or plate 4, the pins also being adapted to pass through holes in the blade 5 when the latter is in shaving position upon guard member 1. The backing 4 is shown provided with a screw 6' adapted to-pass through central hole 5' in the blade and through hole 7 in guard member I 1, to be engaged by a threaded handle 8, whereby the parts may be clamped together for use. As so far described the razor is substantially the same as well known razors. In accordance with my improvement I provide the projections or pins 3 of such shape as to be non-circular in cross section and the openings or holes 5 of the blade have corresponding contour. In the examples illustrated in Figs. 1 .to 5 the projections 3 and blade openings 5 are shown as substantially rectangular in general contour, while in'Figs. 6 to 9 the projections 3 have curved or circularly disposed surfaces at 3" on opposite sides, and the openings 5 of the blade have correspondingly curved or circularly disposed-opposing edges 5 opposed to the curved surfaces 3" of the projections. The projections 3 and the blade openings 9 have corresponding complemental offsets, shown as projecting and reentrant portions to cooperate with one another. In Figs. 1, 4, 6 and 8 the projections '3 have longitudinally. disposed reentrant' offsets, shown as recesses or rooves 3, that receive corresponding 0 sets shown as projections 5 in the openings 5' of the blade, as in Figs. 5and9..

- The ofisets of the projections and blade!" corresponding bottoms of the recesses rota tion of the blade is prevented so that the blade edges are maintained in proper relation along the guard teeth.-

By means of my improvements ll obtain the advantage of so relating the several openings or holes in the blade and giving them such transverse dimensions between the cutting edgesof the blade through the interior thereof. that when the blade is bent between the clamping members 1 and 4 danger of breaking or cracking the blade through its longitudinal central portion is relieved.

An advantage of my improved construction is that although the blades and pins described are particularly adapted to operate together for the purposes specified. the spacing between the opposing proiections 5 of openings 5 of the blade may be such as to receive the pins of backings of the type of Gillette safety razors on the market.

Having now described my invention. what I claim is r.

1. A safety razor comprising a backing. a razor blade adapted to be held on the backing, said blade having pin receiving aper tures each of which apertures has two pin engaging edges opposite each other and between the side walls of the apertures and equidistantly spaced from a line parallel with the cutting edge of the blade, said apertures each being elongated at right angles to the cutting edge and transversely of the blade at a side of each of the said pin engaging edges, pins on the backing of a shape complemental to the shape of the aforesaid apertures in the blade, a guard member having spaced holes to receivh the pins, and means for retaining the backing, blade and guard in assembled relation to one another.

2. In a safety razor, a backing, a blade having pin receiving apertures, each aperture having two pin engaging edges opposite each other and equidistantly spaced from a line parallel with the cutting edge of the blade, the 'said apertures being elongated transversely of the blade on each side of said pin engaging edges, pins on the backing for entering the aforesaid apertures of the blade, said pins having a cross sectional configuration corresponding to the outline of the edges of the apertures in the blade whereby the said ins fit in the apertures of the blade,

having apertures to receive the pins,

mes es and means for holding the backing, blade an}? guard in assembled relation to one anot er.

3. A safety razor blade having stud receiving apertures, each aperture having two stud engaging edges projectingtransversely of the blade toward each other, the said oppositely projecting edges being adapted to engageround studs, and each of the said apertures as a whole being adapted to receive studs of a configuration complemental to the configuration of the apertures.

4. A blade for safety razors provided with stud receiving apertures, each aperture having two cylindrical-stud engaging projections whose ends are opposite each other, said a ertures being elongated transversely of the blade on each side of the said stud engaging ends to receive studs of shapes complemental tothe shapes of the apertures.

5. A blade for safety razors provided with stud receiving apertures in line parallel with the cutting edge of the blade, each aperture having two cylindrical-stud engaging ends projecting transversely of the blade toward each other, said apertures being elongated transversely of the blade on each side of the stud engaging edges to receive studs of shapes complemental to the shapes of the apertures, the elongations of the said apertures in relation to each other as set forth increasing the normal flexibility of the metal blade in the area in lines between and parallel with the outer margins of the apertures in a direction parallel with the cutting edge of the blade.

6. A safety razor blade having stud receiving apertures each aperture having two-cylindrical-stud engaging projections extending transversely of the blade toward each other between side walls of the apertures and equidistantly spaced from a line parallel with the edges of the blade, one of which is the cutting edge, said apertures each being e1ongated at right angles to the cutting edge and transversely of the blade at a side of each of said stud engaging edges to receive studs of a shape complemental to the shape of the apertures.

'7. A safety razor blade having stud receiving apertures, each aperture having two cylindrical-stud engaging projections extending transversely of the blade toward each other between side walls of the a ortures and equidistantly spaced from a ine parallel with the edges of the blade, one of which is the cutting edge, said apertures each being elongated at right angles to the cutting edge and. transversely of the blade at a side of each of said stud engaging edges to receive studs of a shape complemental to the shape of the apertures, the elongations of said apertures in the relation set forth in-v allel with the outer margins of the apertures, parallel with the cutting edges of the blade. 8. A blade for safety razors provided with a handle-connection receiving aperture and 5 stud receiving apertures on each side thereof and alining therewith, each of the last mentioned apertures having two cylindrical-stud engaging projections extending transversely of the blade toward each other, said apertures being elongated transversely of the blade on each side of a stud engaging projection to receive a stud of a shape complemental to the shape of the apertures.

HENRY J. GAISMAN. 

